package gueei.binding.pojo; public class PojoViewModelHelper { PojoViewModelWrapper<?> mWrapper; void registerWrapper(PojoViewModelWrapper<?> wrapper){ mWrapper = wrapper; } void unregisterWrapper(){ mWrapper = null; } PojoViewModelWrapper<?> getWrapper(){ return mWrapper; } public void notifyPropertyChanged(String propertyName){ mWrapper.onPropertyChanged(propertyName); } }